Magnetic properties of carbon nanotubes filled with ferromagnetic metals

被引：22

作者：

Nagata, Atsushi ^{[1
]}

Sato, Hideki ^{[1
]}

Matsui, Yusuke ^{[1
]}

Kaneko, Tetsuya ^{[1
]}

Fujiwara, Yuji ^{[1
]}

机构：

[1] Mie Univ, Grad Sch Engn, Tsu, Mie 5148507, Japan

来源：

VACUUM | 2013年 / 87卷

基金：

日本学术振兴会;

关键词：

Carbon nanotube; Thermal chemical vapor deposition; Ferromagnetic metal; Iron nanowire; Magnetic anisotropy;

D O I：

10.1016/j.vacuum.2012.03.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Carbon nanotubes (CNTs) encapsulating Fe nanowires were prepared by the chemical vapor deposition (CVD) method using ferrocene as a precursor. The influence of the addition of Pt to an Fe catalyst, which is required for growing CNTs by CVD, on the magnetic properties of the resulting CNTs was examined from the viewpoint of enhancing coercivity. Our results showed that the addition of a Pt layer on the Fe catalyst deposited on a substrate increased the coercivity of the Fe-filled CNT. This increase is due to changes in the easy magnetization axis of the Fe nanowires in the CNTs. This result indicates that the magnetic properties of the Fe-filled CNTs can be tuned by the controlling the growth conditions, which is suitable for applications in areas such as magnetic recording media and medicine. (C) 2012 Elsevier Ltd. All rights reserved.

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页码：182 / 186

页数：5

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